Backing out my change to avoid pulling by date on branches, my assertion that this didn't work was incorrect. thanks to cls for figuring this out.

tools/tinderbox/build-seamonkey-util.pl

@@ -18,7 +18,7 @@ use POSIX qw(sys_wait_h strftime);
 use Cwd;
 use File::Basename; # for basename();
 use Config; # for $Config{sig_name} and $Config{sig_num}
-$::UtilsVersion = '$Revision: 1.69 $ ';
+$::UtilsVersion = '$Revision: 1.70 $ ';
 
 package TinderUtils;
 
@@ -578,21 +578,17 @@ sub BuildIt {
         $ENV{MOZILLA_FIVE_HOME} = "$binary_dir";
         
         my $cvsco = '';
-		# Tack on pull by date if requested.  Don't pull by date on a branch,
-		# cvs currently only supports one tag, either a date tag or a branch tag,
-		# we will assume branch tag wins for now.
-		if ((not defined($Settings::BuildTag)) or $Settings::BuildTag eq '') {
-		  if ($Settings::UseTimeStamp) {
+
+		# Note: Pull-by-date works on a branch, but cvs stat won't show
+		# you this.  Thanks to cls for figuring this out.
+        if ($Settings::UseTimeStamp) {
             $start_time = adjust_start_time($start_time);
             my $time_str = POSIX::strftime("%m/%d/%Y %H:%M", localtime($start_time));
             $ENV{MOZ_CO_DATE} = "$time_str";
             $cvsco = "$Settings::CVSCO -D '$time_str'";
-		  } else {
+        } else {
             $cvsco = "$Settings::CVSCO -A";
-		  }
-		} else {
-		  $cvsco = "$Settings::CVSCO";
-		}
+        }
         
         mail_build_started_message($start_time) if $Settings::ReportStatus;